Upd 2021: Ssis858 4k

Ignoring this update leaves significant performance on the table. Users who have installed the patch report the following improvements:

Older SSIS858 firmware often clipped highlights when converting SDR to HDR. The new 4K UPD introduces a dynamic tone mapping algorithm. This means that when you watch older Blu-ray rips (1080p SDR), the chip analyzes the brightest parts of the scene and adjusts the backlight on the fly, preventing the "washed out" look often associated with cheap upscalers. ssis858 4k upd

The term stands for Universal Pixel Driver or, in some contexts, Update Package for Display . For the SSIS858, the "4K UPD" is a microcode patch that focuses on three critical pillars: Ignoring this update leaves significant performance on the